Weekend game deals: 50% off Dungeon Siege III, Dead Rising 2

Along with the usual weekly sales, the folks behind The Humble Bundle are offering mega savings on Frozen Synapse and six other indie titles (Trauma was added today). If you're looking for more mainline discounts, Steam has knocked 50% off the recently released Dungeon Siege III, Impulse cuts 50% off Dead Rising 2, Resident Evil 5, Street Fighter IV and others, Microsoft has reduced Assassin's Creed: Brotherhood to $19.99, while GamersGate has 60% off various dated hits including F.E.A.R., S.T.A.L.K.E.R. and Unreal.